/*公用头部*/
*{
    box-sizing: border-box;
}
html{
    font-size:10px;
    height:100%;
}

body{
    font-weight: normal;
    line-height: 1.6;
    color: #333333;
    font-size: 1.6rem;
    width:100%;
    height:100%;
    padding:0px;
    margin: 0px;
    font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", "FontAwesome", sans-serif;
}
.header_top{
    height:50px;
    padding:10px;
    position:relative;
    border-bottom:1px solid #d5d4d4;
    box-shadow:0 -1px 1px #eee;
    background:#fff}
.st_logo{
    position:absolute;}
.st_top_menu{
    display:block;
    width:32px;
    height:22px;
    position:absolute;
    right:10px;
    top:14px}
.header_top .tit{
    padding:0;
    margin:0;
    color:#333;
    height:30px;
    line-height:30px;
    text-align:center;
    font-size:1.6rem;
    font-weight:500}
.st_back{
    position:absolute;
    left:10px;
    width:30px;
    height:30px}
.st_back a{
    float:left;
    width:30px;
    height:24px;
    margin-top:3px;
    background:url(../images/st_user_ico.png) no-repeat 0 0;
    background-size:355px auto}